Agree with Bill... a lecturer or instructor should not present a candidate who isn't ready. If a person has a problem choking up in front of the lodge, the Master can arrange to have him examined by a committee, which then reports back to the lodge.
But in case the committee or the lodge votes unfavorably, that just requires the candidate to practice some more before trying again. In jurisdictions where there is a time limit for turning in the lectures, there may need to be an extension, otherwise, keep practicing.
When I teach the lectures, I will exemplify it for him (at the degree, typically he only gets to hear it up to the obligation), then I go thru it part by part, as to what each piece really means. Then we start the learn-by-rote process so that he starts the memorization. If you simply start memorization without the explanation, that might be part of the problem...